title: Tunable and stable UV-NIR photoluminescence from annealed SiOx with Si nanoparticles.
abstract: We demonstrate stable and tunable light emission in ultraviolet to near infrared regime by using annealed SiOx sample. By adjusting the ratio of Si and O of SiOx, different wavelengths such as ultraviolet, visible and near infrared photoluminescence can be tuned. From the results of transmission electron microscope, various sizes (1~4 nm) of the embedded Si nanoparticles were formed. Nanoparticles with smaller sizes were indeed formed for UV-blue emitting samples and the origin of light emission may be misattributed to the quantum confinement effects. However, we found the efficient and stable light emission in UV-blue regime, with lifetime on the order of nanoseconds, is dominantly from the defects.
authors.forename: Kung-Hsuan
authors.initials: KH
authors.lastname: Lin
authors.forename: Sz-Chian
authors.initials: SC
authors.lastname: Liou
authors.forename: Wei-Liang
authors.initials: WL
authors.lastname: Chen
authors.forename: Chung-Lun
authors.initials: CL
authors.lastname: Wu
authors.forename: Gong-Ru
authors.initials: GR
authors.lastname: Lin
authors.forename: Yu-Ming
authors.initials: YM
authors.lastname: Chang